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Frequent Visitor

## Dax - How to calculate average based on quantity on each row.

I am trying to calculate an average based on number of transactions and #days to complete.

The dataset looks like

TX_CNT           DAYS_TO_COMPLETE

5                             13

2                              5

1                              3

So the average days to complete by transaction is 9.75 = ((13*5)+(5*2)+(3x1)) / (5+2+1)

I have this data in one table coming from SQL.

How can I calculate the average across rows while considering the TX_CNT.

FYI I have other attributes in the table which I'll use for legend, slicers etc... but I am trying to create a measure I can use.

Thank you!

1 ACCEPTED SOLUTION
Super User

If your table contains the two columns shown, you can write a measure like this to perform the weighted-average calculation:

``````Average days =
DIVIDE (
SUMX (
YourTable,
YourTable[TX_CNT] * YourTable[DAYS_TO_COMPLETE]
),
SUM ( YourTable[TX_CNT] )
)``````

Does that work for you?

Regards,

Owen

Owen Auger
Blog
3 REPLIES 3
Responsive Resident

Hello @ChristianR ,

Create a below two measures

Measure = MAX(Table[TX_CNT])*MAX(Table[DAYS_TO_COMPLTETE])

Measure 2 = [Measure]/SUM(Table[TX_CNT])
Super User

If your table contains the two columns shown, you can write a measure like this to perform the weighted-average calculation:

``````Average days =
DIVIDE (
SUMX (
YourTable,
YourTable[TX_CNT] * YourTable[DAYS_TO_COMPLETE]
),
SUM ( YourTable[TX_CNT] )
)``````

Does that work for you?

Regards,

Owen

Owen Auger
Blog
Frequent Visitor

@OwenAuger perfect!   I'm still getting my bearings around DAX.

Thank you.

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